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Finding the Fourth Proportional to 71,472.43, 98,629.42 and 39,644.29

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Solution

The fourth proportional to 71,472.43, 98,629.42 and 39,644.29 is: 54,707.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,472.43 : 98,629.42 = 39,644.29 : x
  2. Step 2: Convert to fraction form
    71,472.43/98,629.42 = 39,644.29/x
  3. Step 3: Cross multiply
    71,472.43x = 98,629.42 × 39,644.29
  4. Step 4: Simplify right side
    71,472.43x = 3,910,093,329.01
  5. Step 5: Solve for x
    x = 3,910,093,329.01/71,472.43
  6. Step 6: Final answer
    x = 54,707.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.